Class CommonBits

Hierarchy: Object , CommonBits

public class CommonBits

Determines the maximum number of common most-significant bits in the mantissa of one or numbers. Can be used to compute the double-precision number which is represented by the common bits. If there are no common bits, the number computed is 0.0.

Other

version: 1.7

public CommonBits()

public static long signExpBits(long num)

Computes the bit pattern for the sign and exponent of a double-precision number.

Parameters:: num - num

Returns:: the bit pattern for the sign and exponent

public static int numCommonMostSigMantissaBits(long num1, long num2)

This computes the number of common most-significant bits in the mantissas of two double-precision numbers. It does not count the hidden bit, which is always 1. It does not determine whether the numbers have the same exponent - if they do not, the value computed by this function is meaningless.

Parameters:: num1 - num1 the first number; num2 - num2 the second number

Returns:: the number of common most-significant mantissa bits

public static long zeroLowerBits(long bits, int nBits)

Zeroes the lower n bits of a bitstring.

Parameters:: bits - bits the bitstring to alter

Returns:: the zeroed bitstring

public static int getBit(long bits, int i)

Extracts the i'th bit of a bitstring.

Parameters:: bits - bits the bitstring to extract from; i - i the bit to extract

Returns:: the value of the extracted bit

public void add(double num)

public double getCommon()

public String toString(long bits)

A representation of the Double bits formatted for easy readability